The
unassuming object to the left is actually the world's oldest pearl, unearthed
by French researchers at a Neolithic site in the Arabian Peninsula:

Discovered in the Emirate of Umm al Quwain, United Arab Emirates
(UAE), the pearl was believed to have originated between 5547 and 5235
BC.

"Gemmologists and jewellers have popularised the idea that
the oldest pearl in the world is the 5000-year-old Jomon pearl from
Japan. Discoveries made on the shores of south-eastern Arabia show this
to be untrue," Vincent Charpentier, Sophie Méry and colleagues
at the French Foreign Ministry's archeological mission in the UAE, wrote
in the journal Arabian Archaeology and Epigraphy.